(bonus) Which of the following sets of elements should have the most similar chemical properties? (1 pt)
*
1 point
Sodium (Na, #11), Aluminum (Al, #13), Chlorine (Cl, #17)
Chlorine (Cl, #17), Argon (Ar, #18), Potassium (K, #19)
Beryllium (Be, #4), Calcium (Ca, #20), Radium (Ra, #88)